Roll for paper-pulp engines



(No Model.)

J. H. HORNE.

ROLL PORPAPBR PULP ENGINES. No. 310,203. APatented Jan. 6, 1885..

FW- E JE 'Idil UNITED STATES PATENT OFFICE.

ROLL FOR PAPER-PULP ENGINES.

SPECIFICATION forming part of Letters Patent No. 310,203, dated January 6, 1885.

Application filed August QT, N84.

To all whom 'IIL '1n/ay concern,.-

Be it known that I, JOHN HENRY Henna, a citizen of the United States, residing at Lawrenee,in the county of Essex and State of Massaehusetts,have invented certain new and use f ul Improvements in Rolls for Iape1Pulp Engines; and I do hereby declare the following to be a full, clear, and exact description ot' the invent-ion, such as will enable others skilled in the art to which it appertains to make and -use the same, reference being had to the accom reference marked thereon, which form a part of this specification.

This invention relates to a class of pulpengines in which a male grinder, cone shaped or cylindrical, and furnished with knives, is adapted to enter and fit a similarly shaped shell, the inner periphery of which is armed `with a series of longitudinal blades or knives similar to and co-operating with those on the male grinder.

My present invention may be considered an improvement on the invention shown in Letters Patent of the United States No. 163,728, issued on the 25th day of May, 1875, and is based on the manner of constructing the periphery of the male grinder or cone to which the blades are attached and secured, whereby a deeper filling of wood is obtained and the knives maintained securely and rigidly in position until worn out, which cannot be done.

by the means shown in the above-mentioned invention as hitherto constructed.

The drawings represent, in Figure I, a vertical longitudinal section ol a roll embodying my improvements with a knife in position, while Fig. 2 is a similar section of the roll without the blade. Fig. 3 shows a longitudiY nal section of a roll as made in the old form for purposes of reference, and Fig. 4 acrosssection of saine. Fig. 5 represents a like scction of a roll embodying my improvements.

To a complete understanding of my invention it will be necessary to describe somewhat brieily the method o1 fastening the knives in rolls as hitherto practiced, and thus define more precisely and clearly the advantages embodied in my improvements.

In the drawings accompanying this speciication I have shown in Fig. 3 a longitudinal section of a roll or grinder, which is repre- (No model .l

sented at A as Irusto-conical in shape. The

shell is shown at a, and in the periphery ol' the latter are created a series of longitudinal t grooves, b, (represented by the dotted line,`) i which receive the blades, one ot' which is shown at I. llransversely of the said pei riphery are cnt or turned aseries of annular l channels, c c, while one side of the ribs d (l intervening between the channels is underl cut, by which overhanging horizontal lips c o are formed. Similarly the blades I3 B are constructed with a series of transverse cuts y or notches upon their lower edges, with prof jections g g corresponding to those formed on the periphery .of the shell a, but oppositely disposed in order that the spurs gg on the blades interlocking with the lips or spurs e e on the shell shall secure and fasten the blades to the roll. In this manner of securing the knives or blades, by examining the drawings it will be observed that the latter rest upon the bottom ot` the longitudinal grooves l) b, the latter being cut as deep as the annular concentric channels c c; hence when the blades B B are in position a part of the lower edge of the latter is buried inthe shell a ofthe roll, while the wood filling resting upon the pe.- riphery of said shell is necessarily made less deep, (compare Figs. 4 and 5,) and with less holding power, owing to the small bearingsurface ofthe blade exposed; as a consequence, the blades upon being worn to any extent become loose, and consequently ineffective, and new bars must be substituted. It is to overcome these objections that I have constructed the periphery ot' the roll C in the manner I have done, which is shown as ofthe usual form adopted in pulp engines of this class, with an outer shell, D, integra-l on its periphery,`bnt provided with a series of annular concentric rings, E E, 81e. These rings may be cast integral with the shell, or may be made separatel y and shrunk on. In either ease they would be undercut, forming projecting lips l1, h, which will engage and interlock with the spurs or shelves g g, formed on the blade, as previously described. A prominent difterthe roll C is that the longitudinal grooves I I) in the first case are necessarily cut as deep as l thcbottom of the annular channels o c, .in orence in the construction of the periphery ot` the shell c ot the roll A from the'shell D ol' der to admit the blade sufficiently to interlock the parts e c With g g. This lessens the depth of the Wood iilling F by the depth the blade enters the shell a of the roll. On the ot-her hand, in the construction I propose to adopt the entire depth of the blade is above the periphery ofthe shell D of the roll C, eX- Vcept that portion which enters and fills the grooves b b, the depth of which is i ust sufiicient to steady the lower edge of the blades and maintain them iu their proper relative positions before the wood iilling is inserted. This is effected by leaving in lien ot' the channels c c the annular projecting ribs or rings E E.

The strips F F ol' woodiilling adapted to my improvements have transverse ents, slots, or recesses 71?, corresponding` in position and depth to the annular ribs E E upon their lowest edge, and hence when the iilling is driven home it rests on the outer periphery of the roll supporting the bar its entire depth, and an increased depth of lllling is obtained by the .height of the annular ribs F E, which hitherto have been sunk in the periphery or shell of I the roll. Each' of these ribs is undercut on i one side, forming an annular flange, l1, and each of these recesses or slots Il? of the blades F is so shaped as to leave a tongue, hl, for eugaging with one of said annular iianges. Furthermore, after the blades are applied to the ribs by interlocking, the Wood filling F F is driven in, and the i'ull depth ol" the bar is exposed for a bearing-surface, which allows the bars to completely Wear down Withoutbecom- I ing loose, and this is effectedsolely by the greater depth ol Wood lil ing, which bears much deeper space for the Wood filling, eonn sequentl y a greater bearing-surface by which the blades are maintained iixed, and a better roll obtained, inasmuch as the bars or blades can be used a longer time and the roll requires iilling less often, since the bars can be kept rigid and fixed until completely Worn out.

I claim-- l. The roll C, having annular ribs E raised thereon, each rib being` provided on one face with a projecting annular ilange, 71 in combination with a series ot' blades, F, each of which has in itsinneredge aseries ot' recesses, z, forming tongues h, which interlock with said llanges h, substantially as set forth.

2. The roll C, having longitudinal grooves b and unbroken undercut annular ribs E, in combination with blades F, which lit into grooves Z/ and interlock with said ribs, substantially as set i'orth.

In testimony Whereotl I ai'iix my signature in presente ol" two Witnesses.

JOHN HENRY HORSE. lVitnesses:

lll.. E. Lonen, A. F. HAYDRN. 

